I check mine once per week or so, and I ride maybe 4 times per week or so. I run mine about 28-30 psi or so. Max is 33-34 or so psi, but there is this section of broken up pavement where I have to go to get on the trail, so I run a little low because of the bumps there.

Read the rec pressure on the side wall, and then experiment in that ballpark for what works for your ride. I find I vary the pressure right down to what road I'll be on regularly.